NTPC LIMITED
(A Govt. of India Enterprise)
AURAIYA GAS POWER STATION, DIBIYAPUR
INVITATION OF EXPRESSION OF INTEREST (EOI) FROM VENDORS FOR GAS TURBINE
ROTOR REFURBISHMENT WORK
Sl. No. 09. Package no. EOI/1012/C&M/GI/001, Invitation of Expression of Interest (EOI) for Gas Turbine Rotor Refurbishment Work at NTPC Auraiya. (Tender fee & EMD is NIL) Document sale start date/sale close date: 12.05.2017 TO 23.06.2017, Last date & time of receipt of bid : 23.06.2017, 11.00 HRS. Bid opening date and time: 23.06.2017, 11.30 HRS.
Introduction:
NTPC Limited is the largest power generating company of India. It was incorporated in the year 1975, with the objective of planning, promoting and organizing an integrated development of power stations in India. It has today emerged as an ‘Integrated Power Major’, with a significant presence in the entire value chain of power generation business, with a current generating capacity of more than 47,000 MW.
To realize its vision & mission of becoming the world's leading power company by providing reliable power in an economical, efficient & environment friendly manner, NTPC is striving hard to maintain its existing power stations & erecting new projects.
Auraiya Gas Power Station is one of the gas station of NTPC Ltd. There are four numbers of Gas Turbines of capacity 112.9 MW (OC) each and two numbers of Steam Turbines of capacity 109.2 MW. OEM of machines is M/S MHI Japan. Gas Turbine rotor is refurbished in every 80,000 to 1, 00,000 Equivalent operating hours (EOH) to maintain turbine reliability. One of the GT rotor has completed its life and needs its refurbishment (Comprehensive Rotor Inspection i.e. CRI).
NTPC invites Expression of Interest from reputed vendors in India who have experience in executing the contracts for Rotor refurbishment of industrial Gas Turbines.
Scope of Work:
About the Rotor:
Gas turbine rotor consists compressor part and turbine part, coupled together with bolted coupling, called marriage coupling. Compressor is of 19 stages and discs of compressor are shrink fitted on central hollow shaft. Turbine is of four (4) stages, discs of turbine are clamped together with ten (10) number tie bolts. Physical detail of the rotor is as under-
1.1Total length: 10000 MM (approx.)
1.2Total weight (bladed rotor): 56 Tons (Approx.)
1.3Maximum diameter of bladed rotor: 2820 MM (at turbine end)
1.4Diameter of rotor journal: 484 MM
Note: Dimensional drawing of Gas Turbine rotor to be refurbished is attached for reference purpose.
The brief scope of work for CRI of Gas Turbine rotor is given below.
a.Run out checking of combined rotor on lathe
b.Removing of GT- Compressor marriage coupling cover plate.
c.Removal of coupling bolt (72 nos) of the marriage coupling.
d.De coupling of
e.Run out checking of compressor rotor on lathe and machining of marriage coupling.
f.Run out checking of turbine rotor on lathe and machining of marriage coupling.
g.Shot peening of the blade groove of compressor rotor.
h.Inspection of compressor all the nineteen row blades. VT, PT & MT shall be carried out.
